Quote Originally Posted by Phantoms001 View Post
I use something similar to test dryers and power my welder. I purchased a 220 box from home depot. I then took 2 vacuum cords picked up while scrapping and stripped the ends. I connected 1 cord to the first 220 leg, then a second cord to the next 220 leg. I plug 1 vacuum cord in a regular 110 socket, plug the other vaccum cord in another 110 socket and have 220 when needed. It also has been valuable if I am away from the house and need 220 for something. If I need to weld something at a friend's home, I just take my home made 220 extension cord. No need to unplug my dryer, install a new breaker and run a 220 outlet, it's completely safe, and it all cost me about 5.00.
The potential danger using a pair of 110 outlets to get 220 volts is that should one outlet be wired improperly ie: reversed neutral.



You can purchase a cheap tester to make sure the plugs are wired properly before attempting the procedure outline above, I use a multi meter to assure power is only coming from the hole in the outlet made for the small prong of the plug.